"It's time to worry less about capital appreciation and more about capital preservation," Jim Cramer told viewers of his "Mad Money" TV show Tuesday -- at least until the Federal Reserve finally acts and slashes rates big. Cramer said he wants to keep home-gamers involved in the market, but advised them to keep a low-risk profile. They should invest in stocks with good dividends and hold some cash on the sidelines to take advantage of opportunities. And one of those opportunities has arrived, said Cramer, when four companies recently took a lesson from Donald Trump and fired three CEOs and one chairman. Cramer examined each of these firings to see which ones will make money.